Program-transmission over wires



Aug. 18, TQZS.

J. F. TOOMEY PROGRAM TRANSMISSION OVER WIRES n l FiledNov, 11, 1922*INVENTOR.

05W firm/w ATTORNEY siding at New "ii 013k, in the county York and. 55mmof N $502k haw 53m certain Impmvam ents m Wag awn r missaima 3 m? Wires,Willflh we. qfifml-sw in is specifi-rmtimn [hi8 imvemion mlaies t0Pystams 0:? c0mmunication and mam pwrtieuimiy Bo 10 tems fordissamimhhag news, infmrmwbim'n music or thaliike.

Various Echemes have, men tofore "for pmgmm iikf'rl'filfil'fl The onlymm 0 uhes'e. "-avh'ic ili. Men exjgploiteii any 05 as radio bmadcastingthat is, the dissa1r1i, 1nr|;iun ui ne'wsr-a, iiz formimsn 01 enterimnamfu by of mafia telephone equipment that; sz'som provided withsuitable radix, receiving sets 20 tuned. $0 the proper warm length mayceive the distributed cntm'tminmsm; m: the:

like.

This method Imwavezu, "haw "very swims objeccions. In the fiww; placeHYETHETGHKZ 25 bmadcasting staiinns in a 51 mm: area 01;

pro posed herem W pm" $2 3095.

emte on mam lengths sl'zmciemiy close m gather to interfere with eachother. thermal-e, radio telephonic transmi @im1 n%- fissarily involvesthe 05? a. much Wider band ofcile fr -quwc khan is for Wireless i; I

i v,g mph PHYFED'SK and, in ViQ'W Qf the fact that the num oer Wwrsmw:lengths available for radio commrmic' "10m am mans-f essarily limited itis 11m? s'wme 3-) Kengths necessary 01 cmnmmmifl mam mini cation shmlk.ha "M2515; mere entm" .illlflfiht, l avail himseizf: of 11mfin'ansmitiza-zfi tion or entaflminmem, (each. iniiiv" m scriber must prvide himself w mceifiving equigmmnt which "m'vahas upon 111a; wellness e2112; it tmries which are coimtw 'y shaming, *wg eiiwz' W1 amount 0:?ielicmc e, mid 21213311 5 22 apparatus such 21% coils, aemm; fliers em,all m? which invsive mmnce. MOK'EQWJI, this min rac aivi as; now knawgzfi is "Best, miww ugly thing, aiasoiubdy out at pleura home analrequiring "for iias 'WUI'k 07E unsighfiy wii'img.

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h 02* pmwer mt'wur'irs fur m lurpcz-m by transmiih 0W1" sunk existing Nfimsv Such 101 ha 61 'h plicmmd a play mam: 0?? "my high frequemg 1*same ii'mth Dds of during ifle periodsg $052M mad for trmsn "1g. 11mm,inia rlzmyrci w anti-21- trail" "1 1511 3 phi 1%; sc um ed mus mommfinomimfi y' and Han; imation 0x,"

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( um p himself I f ma late: 2 a @9011 M a the Whammg; m Whllth mines thecribers teiephum anly awe-d1 and 1a myely 01' never mess caflssu=s2icmmm5 in mind, it is on "ix; pmvidie sim- I a wgements "m mums ourother inmcm may transmitted y i ionic flew mices from a win transmiifinstation. over A, 211 .23 m interfereline This inwuimbie m pmgmm fully mBil derstood by reference to the following detailed description thereofwhen read in connection with the accompanying drawing, the figure ofwhich discloses a circuit arrangement illustrating the principles of thein- Vention.

Referring to the drawing, L designates an ordinary telephone subscribersline terminating at one end at a subscribefls station A and the otherend in a central oflice B. At the station A, the usual form of telephoneset 10 is provided'for ordinary telephonic purposes and asupplementalkey K is provided for associating with the line a program receivinequipment comprising a loud speaking receiver 11. lhe loud speaker 11 isassociated with a circuit by means of a transformer 14, the circuit 30being bridged across the line under the joint control of the key K andthe subscribers svl'ritchhoolr.

At the central station 13, the line terminates in the usual type ofanswering jack ll, whereby telephonic con'ununication may be establishedbetween the line L and other lines terminating at the exchange. Inaddition to the answering jack J, multiple jacks such as J", J. etc, maybe provided, if desired. The usual typeof line relay LR is connected tothe line for controlling the circuit of the line lamp 15,:1nd the cutoffrelay COR is controlled over the sleeve of the answering jack or of themultiples thereof to disconnect the line relay LR when a call isanswered.

In order that the line may be used for program transmitting purposes, anauxiliary operators position is provided at F, a jack J, and a key K,being provided at this position. By means of the key K the line may bedisconnected from the answering jack and its multiples and. connectedthrough a t-ransl oru'ier 27 to a trunk T leading to a programtransmitting station. A marginal line relay llll, and a special relaySR, are connected with the secondary winding of the transformer 27, sothat these relays will be associated with the line when the hey Kactuated to connect the line to the program transmitting station. Anauxiliary cut-oil relay COR may be. operated over the sleeve of thejacl; l, to open the connection to the. program circuit and disconnectthe relays LR, and $13,, the former 0t which controls an auxiliary linelamp 31 and the latter of which controls a disconnect lamp 32.

Further details of the invention may be understood from the operationwhich is as follows:

Under ordinary circiunstances, with the key it, unacluated and thecontact of the lrey at the substation open, the line is directlyconnected to the answering jilClii J. and the nection to the programtrans-- sesame mitting station is open. Consequently, the line may beused for ordinary telephonic purposes in the usual Way, the subscriberoperating the line relay LR by taking his receiver from the switchhool:and the operator eilacing the line lamp 15 by plugging into the jack Jand operating the cut-off relay COR. When, however, the subscriberwishes to be connected wi h the program service, he will remove thereceiver from the hook in the same manner as making an ordinarycall,-and when the operator acknowledges the call Will ask to beconnected to the program switchboard at which the jack J, is located.The operator may then connect the subscriber to the auxiliary opcratorsposition either by a trunking operation, by which the subscriber obtainsdirect communication with the operator at the program switchboard, orthe regular opera tor may, by'means of a call wire, inform the operatorat the program'switchboard that the subscriber desires a programconnection. The operator at the program switchboard will then operatethe lrey K, associated with the line L. The operation of this keydisconnects the line L from the regular switchboard equipment involvingthe jack J and its multiples and connects the subscribers line to theprogram circuit over the contacts of the auxiliary cut-off relay COR,transformer 27 and trunk T. The operation of the key K, also connectsbattery over its lower make contact to the sleeves of the answering jack5 and its multiples, so that the line will test busy at the regularswitchboard as long as it is connected with the program service.

The subscriber may now hang up his receiver and operate the hey K, thuscompleting the bridge 30 over the back contact of the switchhook and thecontact of the key K, so that the loud speaker will be operated by theprogram currents. It will be observed that the condenser 33 in thecircuit 30 is shunted by a risistance '34, and the impedance of thiscircuit is so high that the marginal relay L12 will-not be operated overthe direct current circuit established by actuating the lrey K. Thespecial relay SR, will, however, no operated and will hold open thecircuit of the disconnect lamp 32.

It, now, the subscriber desires to disconnect from the program circuit,he may restore the key K to its normal position, thus disconnecting'theloud speaker 11 and opening the circuit ofthc special relay SR Thisrelay, upon becoming deenergized, closes the circuit of the disconnectlamp 32, this circuit having been previously prepared over the lowermake contact of the key E The glowing: of the disconnect lamp which isassociated with the key X, indicates to the operator that the subscriberno longer desires a program connection. The operatop will they!llSllGX'G tholioy Kilo thus disconnecting lino \L'UNE i 3pm gramtransmihimg o uipmenl; ana roso fills connection oil o o lmo to theansaol mg jack and assooialzol abpomtus all the rogular switchboard Thisal'mngomont of tho circuit enables the line to be restore-d to normalcondition by flue ouXiliats" ooorzz'l as soon the subscriber is throughprogml'o solr'vioa so that incomimg bull: his line can no oomple'tol If,doling the time when film m is conneol'cod' with the program wish 5.: toorigina/co a coll tho romov'ol o A receiver from tho switollhookC(1=II-f3; 3l8 low impolomce circuit to the subscrlbefo thereby aomatlngboth aho spacial M 1 ancl the marginal lino relay LE Tho lino reloy MRcompletes the cirouifi; of the lino.

lamp 3]. at the program switohboorco program opemfior upon obsorvingwill klIlSWQT the call by memo of nary type of coral circuitin laho onor, and if tho call is fol" anoolm Woo 1 opomlod over tho sleevecircuit of tho 3 J Th8 cuoofil meloy disowmeots the L from the programolrwio ,lllwll the key TL '5 actual-ed, 1 M: lilo t" the relays; LR andSR 'l oonmooieflz and. the line lamp 231 is extingu' shoolo It will beobvious thaw the olples herein disclosed may loo on, many organizationswidely fliflliu those illustrated Without (lagoon-1oz the spirit of theinvention 'ilfillflfi following claims,

l fhat 'ls claimocl is:

L In a telephone system, a iolophono lino terminating at one ono of, ocentral and in a subscribors station, Elli at the othm phone goo-21$ thesubscriber s station, an op nmtors position at the, central ofilcohaving jacks lilwereaifi whereby said line lnuy bo intor connected. withother tolophono limos foo telephonic intorcommluoiootiolo aprogramlmnsmiliiing station normall; fluacooooolml from, said lino,- asecond opomtofo posiabion and sW'1i1olm'2g means there-221$; 1'01ooonooezng sold line to said program transmitting stolion, :lml means atsaid second opomtor s posil'ion whereby when line is counseled to saidprogram transmitting station on nary telephone calls originating on thel ne may be answorec at said seoono opoxfai-ors position 2. lb: (Atelephone systonm, :1 iolopllom terminating at a control offico ob r r ra subscribers station oi the oil phone set at tho suboofiiber s Eiljgllerators osition. the contra,

oml opomtos. r:

. station l'lol'millyline, a second operamning' m ms at said soc)JllllUD for (llsconnootinp; (l jack and connecting it 1 would station,:1 secszml PUSH] m.

- other lolo @1- .o pm? c to like psso- Fix mnooth for o limo i' T-"Mfa, tolopllooo Elmo ":l ofiioo at ono end they, a tol phono so 7 T01 i goom limo .uniootiom infill Bolling V normally 1 soooml 'o o Lo low M ng;

otooxrr, halo jack. soul lino mi '1' telopl'zol'llo 11 115: from 'iion,swil ol :lo-rs from with

andimeans associated with said. program 10 transmitting connection foroperating said disconnect lamp when the loud speaking receiver isdisconnected from the line.

In testimony whereof, I have signed my name to this specification this10th day of 15 November, 1922.

JOHN F. TOOMEY.

